Announcing NCM 7.7With NCM 7.7, you can examine the rules that make up an access control list for a Cisco ASA device. Then you can apply filters to display only rules that meet the specified criteria, order the rules by line number or by the hit count, and much more. See new features and improvements.

Click Add Entities, add the node to the Metric Palette, and select the node.

Expand the Response Time History metric group, and drag Average Response Time and Percent Loss to a new chart.

The graph shows that both average response time and percent packet loss are low. The response time ranges from 2 to 7 ms.

To investigate the load, add Average CPU Load and Average Percent Memory metrics to a new graph. Add the memory load in percent to be able to compare the two metrics.

In this example, the CPU load is low (about 5%). The used Average Percent Memory is 18.7%, and so it is not the cause of the issue. The issue might be caused by the allocation of buffer for sending packets.

Investigate whether it is a buffer issue:

Add the Total Number of Buffer Misses to a new graph. In this scenario, there are spikes in the Total Number of Buffer Misses graph.

To find out whether they are caused by a lack of RAM, add Buffer Misses due to No RAM to the Buffer Misses chart.

In this example, Buffer Misses due to no RAM are zero, so insufficient RAM is not the cause of the spikes in buffer misses.

To investigate the buffer misses, add metrics for all types of buffer misses into a new graph.

The following example shows the size of the packets that are being dropped.

In this scenario, all buffer misses values are zero except for small buffer misses. Small buffer misses are thus the cause of the issue. To resolve the issue, increase the buffer size for small buffers, or configure the router to have a larger boundary.

To share the dashboard, simply share the URL. The URL contains all data to recreate the view.

To keep the featured metrics in the dashboard for later use, click Save and enter a name for the Performance Analysis project. You can click Load to view the project again.